Dyeing fibrous material



UNITED STATES PATENT OFFICE DYEING FIBBOUS MATERIAL Joseph Nuesslein, Ludwigshaten-on-the-Bhine, Germany, asaignor, by meme assignments; to General Aniline Works Inc., New York,- N. Y., a corporation of Delaware No Drawing. Original application October 16,- 1925, Serial No. 62,932, and in Germany October-30, 1924. Divided and this applicatio August 19, 1929. Serial No. 387,088

8 Claims. (Cl. 8-5) The present invention relates to dyeing of per cent of isopropylated napthalene sulfom'c fibrous materials and this pplication has been' acid sodium salt, and stirred for about mindivided out from my pe din application Ser. utes. The bath is then heated to the boil in the No. 62,932 filed October 16th, 1925. course of to hour and after being kept Y I I have found -,that the treatment of fibrous boiling for one hour, it is allowed to cool. The

materials with dyeing liquors is considerably goods are then well rinsed. improved if the dyeing liquors are prepared with Or the goods, for example hats in a half an addition of a small quantity of sulfonic acids planked state, carbonized or impure, are wetted of such aromatic hydrocarbons as contain alkyl in the evening before dyeing by handling for 10 roup wi h more h n w bon atoms, espechalf an hour at 70 degrees Centigrade in a bath ially of naphthalene and similar hydrocarbons containing 0.5 per cent of isopropylated naphwith several benzene rings containing propyl or thalene sulfonic acid sodium salt, left in the bu'tyl (normal or iso) groupsbath during thenight and'dyed in the next The term fibrous materials is employed in a morning in the above described manner with an 15 broad way including all textile fibres, for example addition of 0.5 per cent of the said sulfonic acid wool, cotton, natural and artificial silk" and the sodium salt, 20 per cent of Glaubers salt and' like, also jute, straw, paper, leather, hides, furs, the necessary quantity of acid to the dyebath. feathers and the like, and the dyeing process is If instead of the sodium salt the free sulfonic the usual one which is carried out in 'a dyeing acid is employed, the sulfuric acid may' be left 20 liquor as contrasted with the little usual dyeing out wholly or part yin the lather.

The said sulfonic acids enable the fibrous ma- Example 2 terials to be wetted very rapidly in an excellent Unboiled, raw cotton yarn is directly intromanner and make it unnecessary to apply any duced at 50 to 60 C. into a dyebath contain- 25 special boiling operation to the goods before ing 10 per cent of indanthrene blue RS (1106) introducing them into the dyebath. The said and, in each litre, 12 cubic centimetres of caussulfonic acids have the advantage of being intic soda lye of 40 degrees Baum, 1.5 grams of sensitive to acids or hard water. Consequently dry sodium hydrosulflte and 2 to 4 grams of isothey can be employed not only in alkaline or propylated naphthalene sulfonic acid sodium 7 80 neutral dyebaths but also in acid baths. In any salt, dyed for to 1 hour as usual with indancase, very uniform dyeings are produced even threne dyestufi's and finished by rinsing and 4 with dyestufls which make this very difllcult soaping in a boiling bath. y when dyed in the usual way. Example 3 The sulfonic acids may be employed as such 35 or in the state of their salts. Sometimes it may Unboiled, raw cotton yarn is directly introbe advantageous to use the free sulfonic acids duced into a boiling dyebath prepared from 3 or their salts in mixture with aliphatic alcohols, percent of oxamine blue B '(515) and, in each especially the higher members of this group that litre, 10 grams of Glaubers salt and l to 3 is to say such as contain more than 3 carbon grams of isopropylated naphthalene sulfonic 4 atoms. acid sodiumsalt. The goods are dy for 1 The following examples will more fully exin the manner usual for direct dyestufis and plain the manner of carrying the invention into finished as usual. practice which, however, I do not wish to limit The developing of dyestuffs on the fibrous in any way to these examples. The numbers materials may be efiected'in a similar manner.

- after the trade names of the dyestdfl's employed Instead of the sodium salt of isopropylated correspond to those of the Color Index, 1st edition, naphthalene sulfonic acid, other soluble salts or 1924- the free acid'or butylated naphthalene sultonic Example 1 acid or their salts may be employed. What I- claim is:- 50 A piece of woollen-cloth is introduced into a 1. As new articles oi! manutacture aqueous 106 lukewarm dyebath prepared from 0.6 per cent preparations suitable for dyeing comprising a ct cyananthrol BGA, (1077) 0.6 per cent or azovatted vat dyestufl and an aromatic sulphonic flavine FIN, (14'?) 0.2 per cent of sorbine red, acid containing an allwl radicle with more than (54)" 10 per cent 01. Glaubers salt, 2 to 3 per two carbon atoms. 55 cent of sulfuric acid of 66 degrees Baum and 2 2. As new articles or manufacture aqueous 110 preparations suitable for dyeing comprising a vatted vat dyestuff of the indanthrene series and an aromatic sulphonic acid containing an alkyl radicle with more than two carbon atoms.

3. As new articles of manufacture aqueous preparations suitable for dyeing comprising a vatted vat dyestufi, a reducing agent and an aromatic sulphonic acid containing an alkyl radicle with more than two carbon atoms.

4. As new articles of manufacture aqueous preparations suitable for dyeing comprising a vatted vat dyestuff, a reducing agent, alkali and an aromatic sulphonic acid containing an alkyl radicle with more than two carbon atoms.

5. As new articles of manufacture aqueous preparations suitable for dyeing comprising a vatted vat dyestufi and a naphthalene sulfonic acid containing an alkyl radicle with more than two carbon atoms.

6. As new articles of manufacture aqueous preparations suitable for dyeing comprising a vatted vat dyestufi, a naphthalene sulphonic acid containing an alkyl radicle with more than two carbon atoms, and an aliphatic alcohol containing more than 3 carbon atoms in its molecule. 

